MTG Salvation

I recently got into magic with my friends a few months ago when we bought the game night pack. I started with the white deck with them all picking different colors and I was beating them almost every time. They’ve upgraded their decks to be one with blue and white and then another person with green black and red. THey have a lot of counter spells and hexproof and stuff like that. I’m looking to add another color to my white deck. Some of my cards include
-cleansing nova
-celestial mantle
-pristine angel
-subjugator angel
-Ondu the great horn
-planar outburst
-legions judgement
-angel of serenity
-Dragons presence
-yosei, the morning star
I like being in control of the game, I also like flying and lifelink so that I can easily regain life. I love my celestial mantle card as I get to double my life total. What other color should I make my deck, I’m not really sure and what specific cards should I add?

I recently got into magic with my friends a few months ago when we bought the game night pack. I started with the white deck with them all picking different colors and I was beating them almost every time. They’ve upgraded their decks to be one with blue and white and then another person with green black and red. THey have a lot of counter spells and hexproof and stuff like that. I’m looking to add another color to my white deck. Some of my cards include
-cleansing nova
-celestial mantle
-pristine angel
-subjugator angel
-Ondu the great horn
-planar outburst
-legions judgement
-angel of serenity
-Dragons presence
-yosei, the morning star
I like being in control of the game, I also like flying and lifelink so that I can easily regain life. I love my celestial mantle card as I get to double my life total. What other color should I make my deck, I’m not really sure and what specific cards should I add?